NEET BIOLOGY

Detailed explanation-1: -In other cases, each parent provides a different allele of a given gene, and the offspring is referred to as heterozygous ("hetero” meaning “different") for that allele. Alleles produce phenotypes (or physical versions of a trait) that are either dominant or recessive.

Detailed explanation-2: -An organism with two dominant alleles for a trait is said to have a homozygous dominant genotype. Using the eye color example, this genotype is written BB. An organism with one dominant allele and one recessive allele is said to have a heterozygous genotype.

Detailed explanation-3: -If an organism has a heterozygous genotype, containing one recessive allele, the phenotype of the other allele (the dominant allele) is expressed, and the organism is known as a carrier of the recessive trait.

Detailed explanation-4: -Heterozygous, as related to genetics, refers to having inherited different versions (alleles) of a genomic marker from each biological parent. Thus, an individual who is heterozygous for a genomic marker has two different versions of that marker.

Detailed explanation-5: -People who have recessive traits, like blue eyes or red hair, are always homozygous for that gene. The recessive allele is expressed because there isn’t a dominant one to mask it.